A) 2, 80,000
B) 3, 60, 000
C) 3, 20, 000
D) 30,000
Correct Answer: C
Solution :
[c] Present population = 370440 Rate=5% Time=3 years According to question, \[370440=x\,\,{{\left( 1+\frac{5}{100} \right)}^{3}}\] \[370440=x\times {{\left( \frac{21}{20} \right)}^{3}}\] \[\therefore \,\,\,x=\frac{370440\times 20\times 20\times 20}{21\times 21\times 21}\] \[=320,000\] \[\therefore \]Population of city 3 years was =320000.
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